A partner in a rehabilitation program. Your accountabilabuddy is responsible for helping you stay on track with the program, and you are expected to do the same for them. Term originated on "South Park".

Butters was assigned an accountabilabuddy at a camp for "bi-curious" boys to help him stop acting gay.

A same-sex partner with whom you keep accountable to not be bi-curious; conversely, a same-sex partner with whom you explore bisexuality. Accountabilabuddies are most often found at religious camps whose goal is to "get the gay out" of children.